Thursday, May 15, 2008

Charter Communications, the fourth-largest cable system in the United States, has started telling its high-speed Internet customers that it is going to keep track of every site they visit on the Web.

The cable company will sell the data to a firm called NebuAd, which in turn will use it to show ads to Web-surfing Charter customers that are meant to be related to their interests. (Visit a knitting site yesterday and see yarn ads today.)